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Dear I have a probleme about R2 channels Block (r2_q421_blocked), when channels are blocked, i shut/no shut under controller E1, the channels unblock and after a while they become block. We use a 2800 (IOS 12.4) as a voice-gateway, connected to Huawei MA5600. This is the conf of the E1 ports : ---------------------------- controller E1 0/0/0 framing NO-CRC4 ds0-group 0 timeslots 1-15,17-31 type r2-digital r2-compelled ani cas-custom 0 debounce-time 10 release-guard-time 10 seizure-ack-time ...